Bearing bar for furnace grate bars



Oct. 26 1926. 1,604,371

H. J. WEBSTER BEARING BAR FOR FURNACE GRATE BARS Filed August 5. 1925 j j will: a/ M f 'aw/( /1 ifi Patented Oct. 26, 1926.

unirse sra'rss HOWARD J. WEBSTER, OF PHILADELPHIA, PENNSYLVANIA.

BEARING BAR FOR Ftl'PvNl'i.C131l GRATE BARS:

Application filed August 3, 1925. Serial No. 47,783.

rllhis invention relates to bearing-bars used to support furnace grate bars in the fire chambers of a steam boiler furnace and is more particularly designed to support grate bars of the construction shown in my U. S. Patent Number 1,527,940, dated February 24, 1925, in connection with a steam boiler furnace, as illustrated in my U. S.

Patent Number 1,545,715, dated July 14, 1925.

The objects of the invention are:

First, to construct bearing bars of the character referred to which is capable of being readily, cheaply and quickly built into the front, back, or other walls of a tire chamber of steam boiler furnaces and which will prevent the ley-passing or leakage of the high-pressure air usually used in the combustion of the grade of coal used in connection with the grate bars employed.

Second, to so construct the bearing bars with means for supporting the ends of the grate bars, that the lodgement or accumula tion of ashes at the ends of the grate bars is prevented and permits the ready :and easy slicing of the fire at all times.

Third, to construct a bearing bar for the support of grat-e bars which is capable of being employed at the front or back wall or intermediate of said Walls of a fire chamber, and at the same time prevent the passage of a high-pressure air used or the accumulation or lodgment of ashes at the, sections of the bearing bars on which tue -grate bars are adjacent or resting upon.

Fourth, other objects and advantages of the invention will appear from the' detailed construction and arrangement of parts and mode of operation to be hereinafter given.

rl-he invention consists of structural characteristics and relative. arrangements of elements or parts to be more fully described and particularly pointed out in the appended claims.

In the drawings, in which similar reference characters indicate the same parts in the several figures:

Figure 1 is a fragmentary longitudinal section of a fire chamber of a steam boiler "U furnace equipped with the bearing bars.

Figure 2 is an enlarged top plan view of a section of the grate bed showing the bearing bars and manner of supporting the grate bars.

Figure 3 is a perspective and fragmentary view of one of the bearing bars employed at an intermediate point between the fronti and back walls of the fire chamber, and

Figure 4 is a similar view as Figure 3 of a bearing bar employed at the front or back wall of the. .fire chamber.

Referring to the drawings, 10 is the usual front wall and 11 theback or rear wall of a fire chamber 12 of a steam boiler furnace,

13 is the fuel door for feeding fuel to the 65 grate bars 14, 14, supported above the ash pit 15 having the door 16.

The improved front and back bearing bars 17 and 18 are embedded and supported from the side or front and back walls 10 T0 and 11, as indicated, and preferably comprise, as shown in Figure 4, a fiat bar see-W tion 19 extending transversely of the fire chamber 12, as shown in Figure 2, and having one of its edges provided with a series T5 of preferably equally spaced and alternating projections 20, 20, and indentations 21,. 1 21, for purposes to be presently described.

The grate bars 14, 14, for which the bearing bars 17 and 18 are particularly designed 80 are of the construction shown and described in my former U. S. Patent Number 1,527, 3 940, and need no further disclosure and are supported with their ends resting on said bearing bars 17 and 1S, as shown in Fig- 55 ures 1 and 2, and said sections of grate bars are arranged side by side, as shown in saidlf patent and indicated by dotted lines in Figure 2.

` lhen the grate surface is to be enlarged 9U or extended, an intermediate bearing bar 22 may be employed, as shown in Figures 131 and 2, and preferably of T-shape in cross section, as shown in Figure 3, and consisting of a flat bar 23 having-each of its edges 95 provided with a seriesof spaced and alternating projections 24, 24, and indentationsf- 25, 25, similarly to and duplicate of those shown in lFigure 4, said projections 24, 24, and indentations 25, 25, of the intermediate iu() bearing bar 22, are oppositely disposed on the two edges of the bar, as clearly illustrated in Figure 3, and said bar 22 has formed integrally with it on its bottom face a depending fiange 26 normal to the plane 105 of said face.

The bearing bars 17, 18 and 22 being arranged as shown and described and the plurality of grate bars 14, 14, being disposed to entirely separate and divide the fire cham- ,150 ber 12 from the ash pit 15, when forced draft or high air pressure is created in said ash pit 15 and belonv the grate bars on which a bed of smaller sizes of anthracite, or other low grade fuel has been disposed, the said bearing bars 17, 1S, and 22 are arranged and in close sealingcontact only with the under portions of the extreme ends of all the grate bars. as shown in Figure 2, to prevent leak age of t ie forced draft or high pressure air at these points, and said air pressure is coinpellcd to pass through the fuel bed in a constant and uniform manner, thereby insuring an even, proper and efficient combustion of the fuel over the entire fuel bed or grate surface, more especially at the end sections of the several grate bars lll, 14;, directly over the improved bearing` bars 17, 18, and 22, for the reason that the said bearing bars are provided with the cut out portions or indentations 21, and 25, which permit the ashes to fall through the slits or openings in the grate bars directly into the ash pit Without lodgement or contact with said bearing bars. Said bearing bars 17, 1S, and 22 also allow for the usual contraction and expansion of the grate bars 141, 14, Without breaking the sealing contact between said bearing bars and grate bars.

From the foregoing description of the construction and arrangement of the elements of the bearing bars and mode of operation, it Will bc readily understood a grate bar supporting means has been devised which comprises a minimum number of simple elements, capable of being cheaply manufactured and readily installed and renewed Without the use of skilled labor.

It will also be seen that all the objects and advantages recited in the statement of invention have been fully carried out, and While the preferred form has been shown and described, it is to be understood that changes Will suggest themselves Without in any Way modifying the material features of construction or departing from the spirit of the invention, as expressed in the claims.

7h-at I claim is:

1. A bearing bar for furnace grate bars having a series of separated draft openings arranged transversely of the longitudinal axes of said grate bars comprising a bar having a top plane surface and an edge provided with a series of separated and alternating projections and indentations, the top surface ofsaid har adjacent to the outline of said projections and indentations so constructed,

ar 1anged and adapted to intimately contact with and support the ends of grate bars placed on said bearing bar and not intercept ashes dropping through the openings at the ends of said grate bars.

Q. A bearing bar for furnace grate bars havin :i series of separated draft openings arranged transversely of the longitudinal ases of said grate bars comprising a straight bar having a top plane surface and tivo parallel straight edges, one of said edges provided with a series of separated and alternating project-ions and indentations, the top surface of said bar adjacent to the outline of said projections and indentations so constructed, arranged and adapted to intimately contact with and support the ends of grate bars placed on said bearing bar and not intercept ashes dropping through the openings at the ends of said grate bars and the other edge adapted to be embedded in or attached to a Wall of a fire chamber of a furnace.

3. A bearing bar for furnace grate bars having; a series of separated draft openings arranged transversely of the longitudinal axes of said grate bars comprising a straight har T-sliaped in cross section and having a top plane surface and two parallel straight edges, each of said edges provided with a series of separated and alternating projections and indentations and arranged with the projections and indentations of one edge being respectively opposite the projections and indentations of the other edge, and the top plane surface adjacent to the outlines of said projections and indentations so constructed, arranged and adapted to intimately contact with and support the ends of grate bars placed on said bearing bar and not intercept ashes dropping through the openings at the ends of said grate bars.

ln testimony whereof I hereunto affix my signature.

HOVARD J. WTEBSTER. 

